90999958 has 32 divisors (see below), whose sum is σ = 160776000. Its totient is φ = 38610432.

The previous prime is 90999947. The next prime is 90999959. The reversal of 90999958 is 85999909.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90999959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74166 + ... + 75382.

It is an arithmetic number, because the mean of its divisors is an integer number (5024250).

Almost surely, 2^90999958 is an apocalyptic number.

90999958 is a gapful number since it is divisible by the number (98) formed by its first and last digit.

90999958 is a deficient number, since it is larger than the sum of its proper divisors (69776042).

90999958 is a wasteful number, since it uses less digits than its factorization.

90999958 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1349 (or 1335 counting only the distinct ones).

The product of its (nonzero) digits is 2361960, while the sum is 58.

The square root of 90999958 is about 9539.3898127710. The cubic root of 90999958 is about 449.7940753284.

The spelling of 90999958 in words is "ninety million, nine hundred ninety-nine thousand, nine hundred fifty-eight".